Calculate the lattice energy of calcium chloride given that the heat of sublimation of Ca is 121 kJ/mol and ¢H°f (CaCl2) 5 2795 kJ/mol.

A volume of 10.0 L of gas at a temperature of 85°C is cooled to a temperature of 5°C at constant pressure. What is the new volume of the gas?

Why are the elements in groups 3 to 12 often used to make dyes?

Which of the following is an accurate example of how the water cycle can influence local weather? A. An increase in evaporation rates along a coastal area leads to afternoon thunderstorms. B. Water in a lake soaks into the local groundwater system.

Particles of clay and silt eroded and deposited by the wind are called? A) till B) loess C) dust D) sod

What is the balanced equation for combustion of dicarbon hexahydride

A 10 pound block of lead-210 has a half-life of 22 years. What percentage of the block still contains lead-210 after 60 years? 1.5% 15% 77% 27%

Combined gas law problem: a balloon is filled with 500.0 mL of helium at a temperature of 27 degrees Celsius and 755 mmHg. As the balloon rises in the atmosphere, the pressure and temperature drop.

1. What hypothesis could you propose about the relationship between the position of a type of atom in a molecule and the number of bonds that the atom forms? Explain your thinking.

The molality of a solution is a measure of - A - moles of solute per kilogram of solution B - moles of solute per liter of solution C - moles of solute per kilogram of solvent D - moles of solute per liter of solvent

Which technology has allowed for exploration beyond our solar system? A) space probe B) space station C) space shuttle D) space observatory